Element "A" belong to 3rd period and group 1 of the modern period table what is the atomic number of the element? which element in the same period has same valency as element A. which element in the group is not metal. Which metal in the group is least reaction
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Answer:
Element is sodium with atomic number11
Same valency is of chlorine but of opposite sign
Hydrogen
Lithium
Francois
Explanation:
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